Why can't i receive international call from my number

Unable to send messages to international number

Serious activities is going on with my sim, I can no longer recharge and make call with it, as soon as I recharged or borrow money, I will be receiving messages and calls...

I can't receive international calls from my line

Why can’t I send text to international number on my mtn line… 08169538257 Kindly help me check thanks